Re: rename-buffer should have current buffer as default-value

[Juri Linkov <juri@jurta.org>]

> emacs -Q
> M-x rename-buffer RET M-n - there is no default value.
>
> The current buffer name should be the default value, available for
> editing.

It's a pity that neither `B' nor `b' interactive code letter can be
used becase `b' requires an existing buffer, and `B' provides the
other buffer's name as default.  But fortunately now Lisp code is
allowed in the interactive specification of a C function:

Index: src/buffer.c
===================================================================
RCS file: /sources/emacs/emacs/src/buffer.c,v
retrieving revision 1.540
diff -c -r1.540 buffer.c
*** src/buffer.c	21 Nov 2007 20:59:46 -0000	1.540
--- src/buffer.c	25 Nov 2007 21:43:41 -0000
***************
*** 1169,1175 ****
  }
  \f
  DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2,
!        "sRename buffer (to new name): \nP",
         doc: /* Change current buffer's name to NEWNAME (a string).
  If second arg UNIQUE is nil or omitted, it is an error if a
  buffer named NEWNAME already exists.
--- 1169,1176 ----
  }
  \f
  DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2,
!        "(list (read-buffer \"Rename buffer (to new name): \" \
! 	      (current-buffer)) current-prefix-arg)",
         doc: /* Change current buffer's name to NEWNAME (a string).
  If second arg UNIQUE is nil or omitted, it is an error if a
  buffer named NEWNAME already exists.

-- 
Juri Linkov
http://www.jurta.org/emacs/